Foundry Networks FESX User Manual

Configuring VRRP and VRRPE
December 2005 © Foundry Networks, Inc. 22 - 7
Figure 22.3 shows an example of a VRRPE configuration.
Figure 22.3 Router1 and Router2 are configured to provide dual redundant network access for the host
In this example, RouterA and RouterB use VRRPE to load share as well as provide redundancy to the hosts. The
load sharing is accomplished by creating two VRRPE groups. Each group has its own virtual IP addresses. Half
of the clients point to VRID 1's virtual IP address as their default gateway and the other half point to VRID 2's
virtual IP address as their default gateway. This will enable some of the outbound Internet traffic to go through
RouterA and the rest to go through RouterB.
RouterA is the master for VRID 1 (backup priority = 110) and RouterB is the backup for VRID 1 (backup priority =
100). RouterA and RouterB both track the uplinks to the Internet. If an uplink failure occurs on RouterA, its
backup priority is decremented by 20 (track priority = 20), so that all traffic destined to the Internet is sent through
RouterB instead.
Similarly, RouterB is the master for VRID 2 (backup priority = 110) and RouterA is the backup for VRID 2 (backup
priority = 100). RouterA and RouterB are both tracking the uplinks to the Internet. If an uplink failure occurs on
RouterB, its backup priority is decremented by 20 (track priority = 20), so that all traffic destined to the internet is
sent through RouterA instead.
Comparison of VRRP and VRRPE
This section compares Foundry’s router redundancy protocols.
VRID 1
Router B = Backup
Virtual IP address 192.53.5.254
Priority = 100 (Default)
Track Port = e 3/2
Track Priority =20
VRID 2
Router B = Master
Virtual IP address 192.53.5.253
Priority = 110
Track Port = e 3/2
Track Priority =20
e 3/2
e 5/1 192.53.5.3
e 2/4
Default Gateway
192.53.5.253
Host3
Default Gateway
192.53.5.253
Host4
Default Gateway
192.53.5.254
Host1
Default Gateway
192.53.5.254
Host2
e 1/6 192.53.5.2
VRID 1
Router A = Master
Virtual IP address 192.53.5.254
Priority = 110
Track Port = e 2/4
Track Priority =20
VRID 2
Router A = Backup
Virtual IP address 192.53.5.253
Priority = 100 (Default)
Track Port = e 2/4
Track Priority =20
Internet
Router1 Router2

Foundry Networks FESX Specifications

General

Brand	Foundry Networks
Model	FESX
Category	Switch
Language	English